How is the copy number of the plasmid vector related to the yield of recombinant protein?

What is the purpose of chemical engineering in biotechnology?

All of the following are research areas of biotechnology $EXCEPT$:

The critical research areas of biotechnology are:
$I$. Providing the best catalyst as an improved organism,usually a microbe or pure enzyme.
$II$. Creating optimal conditions through engineering for a catalyst to act.
$III$. Downstream processing technologies.
$IV$. Multiple Ovulation Embryo Transfer Technology $(MOET)$.
Which of the statements given above are correct?

The experimental manipulation of $DNA$ of different species,producing recombinant $DNA$,is known as:

It is now possible to breed plants and animals with desired characters through